Interestingly, I believe that we need to renew the platforms (because they will be knackered) before the Yanks need to replace the Trident missile system. So SSBN(F) needs to be based on Trident but with the ability/ space to back-fit the Trident replacement. Of course we could always delay SSBN(F) until the new weapon system is available and effectively do what we did with the V boats i.e. new platform & new weapon system at the same time. Trouble is we then have a gap between A7 and the 1st SSBN(F), meaning BAe get rid of all their manpower. I do believe we've been here before! I know, lets order another A boat to fill the gap :lol: